ZZJ-800 Series DC Motor

Overview

The ZZJ-800 Series DC Motor is a specialized series for rolling mill auxiliary transmission duty, designed for frequent start, braking, reversing, and repeated overload conditions in steel plants.

Key Features

• Designed according to IEC-34-13 orientation for mill auxiliary drive duty
• Strong commutation stability under pulsating current and rapid load change
• Class F insulation with robust industrial impregnation process
• Round-frame structure with good heat dissipation and mechanical reliability
• Suitable for both static rectifier supply and DC generator supply

Typical Technical Scope

• Typical standard armature voltage: 220 V / 440 V (other voltages by agreement)
• Duty coverage includes S1 (ventilated continuous), S2 (totally enclosed short-time), and S3 periodic duty
• Typical ambient range in sample: -30C to +40C
• Altitude reference: <=1000 m

Cooling and Protection

• Ventilated and totally enclosed structures are both available depending on duty type
• Protection level includes enclosed configurations up to IP44 in sample descriptions
• Cooling air volume requirement varies by frame size and operating mode

Mounting and Integration

• Mill auxiliary drivetrain integration with elastic coupling is typical
• Terminal box position is right side by default (viewed from drive end), with optional left/top arrangement
• Double taper shaft extension is common in this series

Typical Applications

• Roller table drive
• Screw-down mechanism
• Looper tension roll
• Shear machine
• Lifting / handling equipment in rolling lines

Frame and Model Coverage

• Typical frame codes in sample include: 802A, 802B, 802C, 803, 804, 806, 808, 810, 812, 814, 816, 818
• Models from 810 and above commonly include compensating winding in sample notes

Replacement and Retrofit

ZZJ-800 motors are typically selected for modernization and replacement of legacy mill auxiliary DC motors when matching torque, speed, cooling, and mechanical interface conditions.

FAQ

What is this series mainly used for?

It is designed for industrial variable-speed transmission where reliability, stable torque response, and long-duty operation are required.

Can this series be configured for project-specific voltage/cooling/mounting requirements?

Yes. Electrical ratings, cooling structure, and mechanical interface can be configured according to project duty and site constraints.

Will detailed frame pages be available?

Yes. Frame-level pages can be generated in a second-stage run to provide deeper sizing, model, and application details.